MAXIM MAX9174, MAX9175 User Manual

General Description

The MAX9174/MAX9175 are 670MHz, low-jitter, low­skew 1:2 splitters ideal for protection switching, loop­back, and clock and signal distribution. The devices
feature ultra-low 1.0ps

(RMS)

random jitter (max) that
ensures reliable operation in high-speed links that are
highly sensitive to timing errors.

The MAX9174 has a fail-safe LVDS input and LVDS out­puts. The MAX9175 has an anything differential input
(CML/LVDS/LVPECL) and LVDS outputs. The outputs
can be put into high impedance using the power-down
inputs. The MAX9174 features a fail-safe circuit that dri­ves the outputs high when the input is open, undriven
and shorted, or undriven and terminated. The MAX9175
has a bias circuit that forces the outputs high when the
input is open. The power-down inputs are compatible
with standard LVTTL/LVCMOS logic. The power-down
inputs tolerate undershoot of -1V and overshoot of V

CC

+ 1V. The MAX9174/MAX9175 are available in 10-pin
µMAX and 10-lead thin QFN with exposed pad pack­ages, and operate from a single +3.3V supply over the

-40°C to +85°C temperature range.

Applications

Protection Switching
Loopback
Clock Distribution

Features

♦ 1.0ps

(RMS)

Jitter (max) at 670MHz

♦ 80ps

(P-P)

Jitter (max) at 800Mbps Data Rate

♦ +3.3V Supply

♦ LVDS Fail-Safe Inputs (MAX9174)

♦ Anything Input (MAX9175) Accepts Differential

CML/LVDS/LVPECL

♦ Power-Down Inputs Tolerate -1.0V and VCC+ 1.0V

♦ Low-Power CMOS Design

♦ 10-Lead µMAX and Thin QFN Packages

♦ -40°C to +85°C Operating Temperature Range

♦ Conform to ANSI TIA/EIA-644 LVDS Standard

♦ IEC 61000-4-2 Level 4 ESD Rating

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS

1:2 Splitters

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

CLK IN

ASIC

CLOCK DISTRIBUTION

CLK IN

ASIC

CLK1

CLK2

MAX9174

MAX9174

MAX9176

MAX9176

Typical Application Circuit

19-2827; Rev 1; 4/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE PIN-PACKAGE

MAX9174EUB -40°C to +85°C 10 µMAX

MAX9174ETB* -40°C to +85°C 10 Thin QFN-EP**
MAX9175EUB -40°C to +85°C 10 µMAX
MAX9175ETB* -40°C to +85°C 10 Thin QFN-EP**

*Future product—contact factory for availability.
**EP = Exposed paddle.

Functional Diagram and Pin Configurations appear at end
of data sheet.

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS
1:2 Splitters

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VCCto GND..………………………………………...-0.3V to +4.0V

IN+, IN- to GND...........................................……...-0.3V to +4.0V

OUT_+, OUT_- to GND..........................................-0.3V to +4.0V

PD0, PD1 to GND.......................................-1.4V to (VCC+ 1.4V)

Single-Ended and Differential Output

Short-Circuit Duration (OUT_+, OUT_-) .....................Continuous

Continuous Power Dissipation (T

A

= +70°C)

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

10-Lead QFN (derate 24.4mW/°C above +70°C) ......1951mW

Maximum Junction Temperature .....................................+150°C

Storage Temperature Range .............................-65°C to +150°C

ESD Protection

Human Body Model (R

D

= 1.5kΩ, CS= 100pF)

IN+, IN-, OUT_+, OUT_-...............................................…±2kV

Other Pins (V

CC

, PD0, PD1) ...............................................2kV

IEC 61000-4-2 Level 4 (R

D

= 330Ω, CS= 150pF)

Contact Discharge IN+, IN-, OUT_+, OUT_- ...................±8kV

Air-Gap Discharge IN+, IN-, OUT_+, OUT_- .................±15kV

Lead Temperature (soldering, 10s) .................................+300°C

DC ELECTRICAL CHARACTERISTICS

(VCC= +3.0V to +3.6V, RL= 100Ω ±1%, PD_ = high, differential input voltage |VID| = 0.05V to 1.2V, MAX9174 input common-mode
voltage V

CM

= |VID/2| to (2.4V - |VID/2|), MAX9175 input common-mode voltage VCM= |VID/2| to (VCC- | VID/2|), TA= -40°C to

+85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, |VID| = 0.2V, VCM= +1.25V, TA= +25°C.) (Notes 1, 2, 3)

PARAMETER

CONDITIONS

UNITS

DIFFERENTIAL INPUT (IN+, IN-)

V

TH

+50 mV

Differential Input Low Threshold V

TL

-50 mV

Input Current

Figure 1 -20 +20 µA
MAX9174 V

CC

= 0V or open, Figure 1

Power-Off Input Current

I

IN+,

I

IN- MAX9175

V

IN+

= 3.6V or 0V, V

IN-

= 3.6V

or 0V, V

CC

= 0V or open,

Figure 1

-20 +20 µA

R

IN1

60 108

Fail-Safe Input Resistors
(MAX9174)

R

IN2

V

CC

= 3.6V, 0V or open, Figure 1

200 394

kΩ

Input Resistors
(MAX9175)

R

IN3

V

CC

= 3.6V, 0V or open, Figure 1 212 450 kΩ

Input Capacitance C

IN

IN+ or IN- to GND (Note 4) 4.5 pF

LVTTL/LVCMOS INPUTS (PPPPDDDD0000, PPPPDDDD1111)

Input High Voltage V

IH

2.0

V

CC

+

1

V

Input Low Voltage V

IL

V

-1.0V ≤ PD_ ≤ 0V

mA

0V ≤ PD_ ≤ V

CC

-20 +20 µAInput Current I

IN

VCC ≤ PD_ ≤ VCC + 1.0V

mA

LVDS OUTPUTS (OUT_+, OUT_-)

Differential Output Voltage V

OD

Figure 2 250

475 mV

Change in Differential Output
Voltage Between Logic States

∆V

OD

Figure 2

15 mV

Offset Voltage V

OS

Figure 3

V

SYMBOL

Differential Input High Threshold

MIN TYP MAX

I

IN

+,

I

IN

-

-1.0 +0.8

-1.5

1.125 1.29 1.375

393

1.0

+1.5

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS

1:2 Splitters

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3.0V to +3.6V, RL= 100Ω ±1%, PD_ = high, differential input voltage |VID| = 0.05V to 1.2V, MAX9174 input common-mode
voltage V

CM

= |VID/2| to (2.4V - |VID/2|), MAX9175 input common-mode voltage VCM= |VID/2| to (VCC- | VID/2|), TA= -40°C to

+85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, |VID| = 0.2V, VCM= +1.25V, TA= +25°C.) (Notes 1, 2, 3)

PARAMETER

CONDITIONS

Change in Offset Voltage
Between Logic States

∆V

OS

Figure 3

15 mV

Fail-Safe Differential Output
Voltage (MAX9174)

V

OD

Figure 2 250

475 mV

Differential Output Resistance R

DIFF

V

CC

= 3.6V or 0V 86

160 Ω

V

OUT_+

= open,

V

OUT_-

= 3.6V or 0V

Power-Down Single-Ended
Output Current

I

PD

PD_ = low

V

OUT_-

= open,

_

µA

V

OUT_+

= open,

_

Power-Off Single-Ended Output
Current

I

OFF

PD0, PD1 = low,
V

CC

= 0V or open

V

OUT_-

= open,

_

µA

VID = +50mV or -50mV, V

OUT_+

= 0V or

V

CC

Output Short-Circuit Current I

OS

_

-15 +15 mA

Differential Output Short-Circuit
Current Magnitude

I

OSD



15 mA

PD0 = VCC, PD1 = 0V or
PD0 = 0V, PD1 = V

CC

17 26

Supply Current I

CC

PD0 = Vcc, PD1 = Vcc 25 35

mA

Power-Down Supply Current I

CCPD

PD1, PD0

= 0V

20 µA

Output Capacitance C

O

OUT_+ or OUT_- to GND (Note 4) 5.2 pF

SYMBOL

MIN TYP MAX UNITS

1.0

393

119

-1.0 ±0.03 +1.0

V

OUT

V

OUT

V

OUT

VID = +50mV or -50mV, V

OUT

3.6V or 0V

+ =

3.6V or 0V

- =

3.6V or 0V

+ =

= 0V or V

-

-1.0 ±0.03 +1.0

CC

VID = +50mV or -50mV, VOD = 0V (Note 4)

0.5

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS
1:2 Splitters

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS

(VCC= +3.0V to +3.6V, RL= 100Ω±1%, CL= 5pF, differential input voltage |VID| = 0.15V to 1.2V, MAX9174 input common-mode volt­age, V

CM

= |VID/2| to (2.4V - |VID/2|), MAX9175 input common-mode voltage VCM= |VID/2| to (VCC- |VID/2|), PD_ = high, TA= -40°C

to +85°C, unless otherwise noted. Typical values are at V

CC

= +3.3V, |VID| = 0.2V, VCM= +1.25V, TA= +25°C.) (Notes 5, 6, 7)

PARAMETER

CONDITIONS

UNITS

High-to-Low Propagation Delay t

PHL

Figures 4, 5

ns

Low-to-High Propagation Delay t

PLH

Figures 4, 5

ns

Added Deterministic Jitter t

DJ

Figures 4, 5 (Note 8) 80

ps

(P-P)

Added Random Jitter t

RJ

Figures 4, 5 1.0

ps

(RMS)

Pulse Skew  t

PLH

- t

PHL

 t

SKP

Figures 4, 5 10

ps

Output-to-Output Skew t

SKOO

Figure 6 14 45 ps

t

SKPP1

Figures 4, 5 (Note 9) 0.4 1.3

Part-to-Part Skew

t

SKPP2

Figures 4, 5 (Note 10) 1.9

ns

Rise Time t

R

Figures 4, 5

ps

Fall Time t

F

Figures 4, 5

ps

Power-Down Time t

PD

Figures 7, 8 10 13 ns
PD0, PD1 = L → H, Figures 7, 8

18 35 µs

PD0 = H, PD1 = L → H, Figures 7, 8 92

Power-Up Time t

PU

PD1 = H, PD0 L → H, Figures 7, 8 92

ns

Maximum Data Rate D

RMAX

Figures 4, 5, VOD ≥ 250mV
(Note 11)

Mbps

Maximum Switching Frequency f

MAX

Figures 4, 5, VOD ≥ 250mV (Note 11)

MHz

fIN = 670MHz 55 65

Switching Supply Current I

CCSW

fIN = 155MHz 35 44

mA

PRBS Supply Current I

CCPR

DR = 800Mbps, 223 - 1 PRBS input 37 46 mA

Note 1: Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground

except V

TH

, VTL, VID, VOD, and ∆VOD.

Note 2: Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are 100% tested at

T

A

= +25°C.

Note 3: Tolerance on all external resistors (including figures) is ±1%.
Note 4: Guaranteed by design.
Note 5: AC parameters are guaranteed by design and characterization and are not production tested. Limits are set at ±6 sigma.
Note 6: C

L

includes scope probe and test jig capacitance.

Note 7: Pulse-generator output for differential inputs IN+, IN- (unless otherwise noted): f = 670MHz, 50% duty cycle, R

O

= 50Ω, tR=

700ps, and t

F

= 700ps (0% to 100%). Pulse-generator output for single-ended inputs PD0, PD1: tR= tF= 1.5ns (0.2VCCto

0.8V

CC

), 50% duty cycle, VOH= VCC+ 1.0V settling to VCC, VOL= -1.0V settling to zero, f = 10kHz.

Note 8: Pulse-generator output for t

DJ

: |VOD| = 0.15V, VOS= 1.25V, data rate 800Mbps, 223- 1 PRBS, RO= 50Ω, tR= 700ps, and t

F

= 700ps (0% to 100%).

Note 9: t

SKPP1

is the magnitude of the difference of any differential propagation delays between devices operating under identical

conditions.

Note 10: t

SKPP2

is the magnitude of the difference of any differential propagation delays between devices operating over rated con-

ditions.

Note 11: Meets all AC specifications.

SYMBOL

MIN TYP MAX

1.33 2.38 3.23

1.33 2.39 3.23

110 257 365
110 252 365

141

103
103

800

670

MAX9174/MAX9175

670MHz LVDS-to-LVDS and Anything-to-LVDS

1:2 Splitters

_______________________________________________________________________________________ 5

SUPPLY CURRENT vs. TEMPERATURE

MAX9174 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

603510-15

33

34

35

36

37

38

32

-40 85

fIN = 155MHz

DIFFERENTIAL OUTPUT VOLTAGE

vs. FREQUENCY

MAX9174 toc02

FREQUENCY (MHz)

DIFFERENTIAL OUTPUT VOLTAGE (mV)

700600400 500200 300100

310

320

330

340

350

360

370

380

390

400

410

300

0 800

OUTPUT RISE/FALL TIME

vs. TEMPERATURE

MAX9174 toc03

TEMPERATURE (°C)

RISE/FALL TIME (ps)

603510-15

220

230

240

250

260

270

280

290

300

210

-40 85

fIN = 155MHz

t

R

t

F

DIFFERENTIAL PROPAGATION DELAY

vs. TEMPERATURE

MAX9174 toc04

TEMPERATURE (°C)

DIFFERENTIAL PROPAGATION DELAY (ns)

603510-15

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

2.0

2.1

-40 85

fIN = 155MHz

t

PHL

t

PLH

OUTPUT-TO-OUTPUT SKEW

vs. TEMPERATURE

MAX9174 toc05

TEMPERATURE (°C)

OUTPUT-TO-OUTPUT SKEW (ps)

603510-15

2

4

6

8

10

12

14

16

18

20

0

-40 85

fIN = 155MHz

SUPPLY CURRENT vs. FREQUENCY

MAX9174 toc06

FREQUENCY (MHz)

SUPPLY CURRENT (mA)

700600100 200 300 400 500

25

30

35

40

45

50

55

60

20

0 800

SUPPLY CURRENT vs. DATA RATE

MAX9174 toc07

DATA RATE (Mbps)

SUPPLY CURRENT (mA)

700600500400300200100

25

30

35

40

45

15

20

0 800

PRBS 223 - 1

SUPPLY CURRENT vs. SUPPLY VOLTAGE

MAX9174 toc08

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

3.53.43.33.23.1

31

32

33

34

35

36

37

38

39

40

30

3.0 3.6

fIN = 155MHz

OUTPUT RISE/FALL TIME

vs. SUPPLY VOLTAGE

MAX9174 toc09

SUPPLY VOLTAGE (V)

RISE/FALL TIME (ps)

3.53.43.33.23.1

210

220

230

240

250

260

270

280

290

300

200

3.0 3.6

fIN = 155MHz

t

F

t

R

Typical Operating Characteristics

((MAX9174) VCC= +3.3V, |VID| = 0.15V, VCM= 1.25V, TA= +25°C, RL= 100Ω ±1%, CL= 5pf, PD_ = VCC, unless otherwise noted.)